Java Developer (Onsite at 99Pay Project)

About the position

Role Overview: We are looking for a proactive and self-driven Java Developer to join our team in Brazil. You will take ownership of development tasks, ensure timely delivery, and communicate progress or blockers clearly in a fast-paced environment. Key Responsibilities: Develop and maintain backend services using Java , Spring Boot , and MyBatis Write efficient SQL , understand indexing strategies, and work with relational databases Work with middleware such as Redis , RabbitMQ , Kafka , or Elasticsearch (nice to have) Take ownership of tasks, track progress proactively, and communicate challenges or blockers in a timely manner Analyze and resolve development issues independently Requirements: 1–3 years of hands-on experience in Java development Strong experience with Spring Boot and JDK Solid knowledge of MyBatis Strong SQL skills and understanding of database indexing Experience with at least one messaging queue or caching middleware (Redis, RabbitMQ, Kafka, etc.) is a plus Self-starter with strong ownership and problem-solving skills Fluent in English (spoken and written) Why Join Us: Work onsite at 99Pay , a leading fintech backed by Kuaishou Group Competitive local salary in BRL Clear and efficient interview process (2–3 rounds)